因yin為wei一yi旦dan拉la得de太tai緊jin，在zai副fu軸zhou與yu後hou輪lun緩huan衝chong體ti之zhi間jian會hui構gou成cheng一yi個ge較jiao大da的de逼bi迫po性xing管guan束shu力li矩ju，而er後hou受shou力li矩ju的de影ying響xiang。軸zhou承cheng單dan麵mian受shou力li會hui變bian大da，易yi發fa熱re最zui終zhong導dao致zhi破po壞huai， 縱zong然ran不bu會hui破po壞huai，也ye會hui在zai短duan時shi間jian內nei形xing成cheng較jiao大da間jian隙xi。一yi旦dan軸zhou承cheng孕yun育yu產chan生sheng較jiao大da間jian隙xi
，副fu軸zhou的de直zhi線xian性xing就jiu會hui被bei破po壞huai，輕qing則ze會hui導dao致zhi軸zhou承cheng產chan生sheng破po壞huai，重zhong則ze將jiang非fei標biao鏈lian條tiao軸zhou承cheng齒chi盤pan轉zhuan移yi到dao發fa動dong機ji上shang，導dao致zhi發fa動dong機ji的de破po壞huai。